There are 1762 of the 37900 websites hosted by shopify that mention affiliate. Out of the 300 of those with the most traffic, there were 205 found to have an affiliate (or referral) program.

This is the results from the 205 stores with the most traffic:
101 on specified affiliate networks
85 in-house affiliate programs
11 email to sign up (in-house or on a network)
8 referral programs (in most cases payment by store credit)

For the in-house affiliate programs each registration form is confirmed to be working. These were checked between 20th and 27th November 2017.

The list contain:
Rank #
Domain
URL for info about the affiliate program
URL for affiliate program registration
Comment about in-house, which affiliate network, referral program or email to sign up.
URL for logging in to the affiliate program, this is for the in-house affiliate programs.

There is no upsell or OTO, it's the complete list of 205 affiliate programs.

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